Spraying device



Oct. 31, 1939. w, M, VOGEL 2,178,088

SPRAYING DEVICE Filed July 19, 1938 INVENTOR William 77 M272, Vulgiel Patented Oct. 31, 1939 I 2,178,938 j SPRAYmGDEyIOE. v William Martin'yogel, Bloomfield, N. J. ApplicationJuly 19, 1938, Serial No. 220,041

' Claims. (d1; sea -8 x1 This invention relates to an improvement in spraying devices, and more particularly to the type utilized for the sprayingof liquid'insecticide or similar material.

In most devices of this chaarcter, a siphon tube, leading from a source of liquidsupply, such as a tank or receptacle, is provided with an open end located close to the air blast opening at the-end of the piston chamberor cylinder, and as a blast of air is directed through the opening it creates suction tending to draw the liquid through the siphon tube and distribute it in a fine spray or mist. The object of the present invention is to improve this known type of structure; to -improve the spraying results; to provide a device in which the possibility of the spraying and air blastopenings becoming clogged with dirt or foreign matter is greatly minimized and to otherwisesimplify and improve the general structure of the device.

In the accompanying drawing wherein an em-, bodiment of the invention is shown, Fig.1 is'a sectional view through a portion of a sprayingdevice made in accordance with the invention; Fig. 2 is a front view of the nozzle portion of the invention; and Fig. 3 is a sectional View on the line 3-3 of Fig. 1, looking in the direction of the ar} rows. a

In the drawing I indicates the piston chamber of the sprayen'the same being of cylindrical form, and generally composed of a rolled-up section of sheet metal having-its longitudinal -edges seamed together. Mounted for reciprocation within the cylinder i is a piston 2 of conventional construction, the same beingfastened to one end of a piston rod 3 which extends out of the rear end of piston chamber, usually through an opening formed in a plug located at that end. The projecting end of rod 3 terminates in a handle, not shown, to enable the piston to be reciprocated in the manner well known in sprayer construction.

The forward end of the cylinder l is closed by a cap member 6 having its marginal edge seamed as at l to the end of cylinder I, said cap being formed with a forwardly extending cylindrical cup portion l'l having a front end or wall 5 provided with an annular depression 8 which surrounds a spray opening 9. Fitted within the cap member 9 and held therein by frictional fit or by face thereof and the protruding nose portion ll of member l0.- Enteringinto this chamber M is a siphontube I6 which extends upwardly from The nose portion 1 Lot cuplfl has its frontwall 18 formed with an air blast opening 13 preferably located in'alignment with spray opening 9. As a matter'of'fact-it is desirable to form the aligned openings}! and I3' simultaneously and this can be done-by a blow from a conical punch driven through the front wall 5 of member I! and the front wall of the nose II. Such an operation simultaneously produces the spray opening 9 and b the aligned air blast opening l3, the spray openfing 9 being of larger diameter than the air blast o'pening 3.

-It is desirable that the space l5 between the front Wall 1801 thenose H and the front wall 5 of memberl'l'bedefinitei'andof unvarying size and ofless widththanthat of chamber 14, whereby the amount of liquid ejectedout of the spray opening will be regulated. The fixed spacing of the two walls on the members H and I7 is governed by means of stops I2 .pressed out of the front wall ofthe'nose' H ,.these stops being spaced protuberance's abutting against the rear face of the front wall' 5,.as clearlyseenin Fig. 1. Thus, when thecup-shaped member II is pressed or otherwise. secured in position within the member H, the stops or abutments 12 on the front of the nose portion ll coming in contact with the rear .fac'eofthe; front wall 5 limit the extent to which the cup it maybe forced within member H and the'liquid supply tank! secured to cylinder l in the conventional manner.

spray will be forced out of a spray opening 9 in the form of a finely diffused mist, most desirable in spraying operations. A swirling action of the air and liquid occurs in the annular chamber 14 l as air is directed into the chamber from the cylinder through air blast opening I3. Such action has been found to prevent clogging of the openings 9 and I3 by dirt and other foreign matter, as any dirt tending to collect in or around the openings is driven off by the action of the air and liquid in chamber l4 and in the space H, so that the spraying operation is always effective and the air blast and spray openings 9 and I: seldom, if ever, require cleaning out.

While I have shown and described one embodiment of the invention, it is obvious that the same may be modified in various ways without departing from the spirit of the invention. For example, while I have shown a sprayer of the intermittent type, it will be understood however, that by utilizing the concentric arrangement of piston chamber and air compression chamber and other elements shown in my previous Patent No. 2,054,106, dated September 15, 1936, an extremely satisfactory type of so-called continuous sprayer is ideal for employment in connection with the type of continuous sprayer described in said patent.

What I claim is:

1. A sprayer having an air cylinder provided with a cupped closure cap at one of its ends, said cap having a substantially fiat front wall provided with a spray opening, an inner cap located within and enclosed by the closure cap, said inner cap having a nose portion extending within the closure cap and approaching the front wall of the closure cap, said nose portion formed with a wall spaced from the front end wall of the closure cap, the nose portion of the inner cap being provided with an air blast opening in its end wall, and means located between the end wall of the nose portion and the front wall of the closure cap for holding these walls in definite spaced relation.

2. A sprayer having an air cylinder provided with a cupped closure cap at one of its ends, said cap having a substantially fiat front end wall provided with a central spray opening, an inner cap located within the closure cap, said inner cap having a nose portion extending within the closure cap, said nose portion having an air blast opening aligned with the spray opening, the air blast opening being of less diameter than the spray opening, the nose portion having an end wall in which said air blast opening is formed, said end wall being spaced from the front end wall of the closure cap, the front end wall of the nose portion being formed with several spaced projections located in abutment with the front end wall of the cap by which definite spacing of the front wall of the nose portion from the front wall of the closure cap is maintained and the air blast opening and spray opening are maintained in fixed spaced relation.

3. A sprayer having an air cylinder provided with a cupped closure cap at one end, said cap having a substantially fiat front end wall provided with a spray opening, an inner cap located within the closure cap and provided with a nose portion formed with an air blast opening aligned with the spray opening, the nose portion having an end wall located near but spaced from the front end of the closure cap, the conformation of the nose portion within the closure cap being such as to co-operate with the closure cap to form an annular chamber within the closure cap around the nose portion, the spacing of the end wall of the nose portion from the front end wall of the closure cap being less than the width of the annular chamber.

4. A sprayer having an air cylinder provided with a cup-shaped closure cap at one end, said cap having a relatively fiat front wall, an inner cap fitted within the outer cap, the inner cap having a projecting nose portion formed with a front wall located near but spaced from the rear face of the front wall of the closure cap, said front wall of the nose portion being formed with a plurality of protuberances located in abutment with the rear face of the front wall of the cap to thereby space the front wall of the nose portion a predetermined distance from the rear face of the front wall of the closure cap, aligned openings of different size in the two caps, the larger of said openings being formed in the closure cap and the smaller opening in the nose portion of the inner cap, and a siphon tube leading into the closure cap between the same and the nose portion of the inner cap.

5. A sprayer having an air cylinder provided with a cup-shaped closure cap at one end, said cap having a substantially fiat end wall, an inner cap fitted within the closure cap, the inner cap being provided with a projecting nose portion having its forward end formed with a relatively flat end wall, said nose portion extending within the closure cap and having its end wall located close to and substantially parallel with the end wall of the closure cap, the end wall of the nose portion being provided with spaced projections extending forwardly and into the space between the two end walls and abutting against the rear face of the end wall of the closure cap to thereby limit the extent of projection of the nose portion toward the front end of the cap and to definitely regulate the distance between the two end walls, the two end walls having co-operating spraying openings.

WILLIAM MARTIN VOGEL. 

